EP 1094299 A3 20031126 - Method and apparatus for improving the distance calculation in a dead reckoning vehicle navigation system
Title (en)
Method and apparatus for improving the distance calculation in a dead reckoning vehicle navigation system
Title (de)
Verfahren und Vorrichtung zum Verbessern der Abstandsberechnung in einem Koppelfahrzeugnavigationssystem
Title (fr)
Méthode et dispositif pour améliorer le calcul de la distance dans un système de position à l'estime véhiculaire
Publication
Application
Priority
US 42283099 A 19991021
Abstract (en)
[origin: EP1094299A2] The present invention enables a vehicle navigation system to automatically compensate for odometer measurement errors due to changes in tire size and/or slip, and to avoid odometer recalibration when slip is present. These capabilities improve the accuracy and reliability of the vehicle navigation system. Slip of a vehicle, e.g., a loss of traction, can occur when a road is wet or covered with snow or ice. It can occur when a road is dry, and a vehicle is accelerating or decelerating rapidly. It can occur rounding a sharp corner. Because an odometer is typically hooked up to a driven wheel, the engine or transmission, there may be large sources of error in the distance estimates derived from the odometer. Utilizing conveniently derived slip signals from an anti-lock brake system (ABS) or from a traction control system (TCS), the slip of the vehicle can be accounted for, even absent a GPS signal to recalibrate the system. This allows for improved accuracy of the system which is particularly noticeable in urban environments where GPS signals may not be available. <IMAGE>
IPC 1-7
IPC 8 full level
G01C 22/00 (2006.01); B60R 16/02 (2006.01); G01C 21/28 (2006.01); G01C 22/02 (2006.01); G08G 1/0969 (2006.01)
CPC (source: EP US)
G01C 21/28 (2013.01 - EP US); G01C 22/02 (2013.01 - EP US)
Citation (search report)
- [XY] DE 3143234 A1 19830511 - TELDIX GMBH [DE]
- [Y] US 5912635 A 19990615 - OSHIZAWA HIDEKAZU [US], et al
- [X] EP 0316888 A1 19890524 - STANDARD ELEKTRIK LORENZ AG [DE]
- [X] DE 2751012 A1 19790517 - ESG ELEKTRONIK SYSTEM GMBH
Designated contracting state (EPC)
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
DOCDB simple family (publication)
EP 1094299 A2 20010425; EP 1094299 A3 20031126; EP 1094299 B1 20140312; JP 2001336950 A 20011207; JP 4550255 B2 20100922; US 6360165 B1 20020319
DOCDB simple family (application)
EP 00309147 A 20001017; JP 2000320557 A 20001020; US 42283099 A 19991021